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algebra1 HELP PLEASE

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The height in feet of a rocket after t seconds is given by h(t) = 160t - 16t2.

Find the maximum height the rocket attains:

After how many seconds does it reach this height?

  • algebra1 HELP PLEASE -

    by now you know about parabolas.

    h(t) = 160t - 16t^2

    the vertex of a parabola is at t = -b/2a, which here is

    t = 160/32 = 5

    So, at t=5, h(t) = 400

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